A scientist has designed an electric skin patch that stimulated fur growth in hairless mice and cured his dad’s balding, and has now been made into a hat
Source:
https://www.newscientist.com/article/2217050-a-hat-that-zaps-the-scalp-with-electricity-helps-reverse-male-balding/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home